Grinding machine



' 1 1,644,057'4 Oct 4, 927 L R. HEIM GRINDING MACHINE Filed Oct. 8..1921 I5 Sheets-Sheet 1 ll|||| w INVENTOR l ATTORN S 4 Oct '7 l.. R.HEIM GRINDING MACHINE Filed oct. e. 1921 v s sheets-sheet 2 F N wIIIIITI I I I I I I I I I M INVENToR k l BY 62M ,f1/W17, MWL

d ATToRNEYs oct. 4. 1927. 1,644,057

L. R. HEIM GRINDING MACHINE Filed ocng, 1921 :s sheets-sheet s ew?. MQW

ATTORNEY Patented d. 4, 1927.

UNITED STATES PATENT-OFFICE.

LEWIS n. Harn, or DANBUBY, coNNEcrIcUr, i

cINcINNArI eaaINnnnsl INCORPORATED, or CINCINNATI, oIIIo,

or oHIo.

ASSIGNOB, BY MESNE ASSIGNMENTS, T0 A CORPORATION GRINDING MACHINE.

Application led October 18, 1921. Serial No. 506,222'.

This invention relates to grinding apparatus, and more particularly tolapparatus especially suited to grind cylindrlcal bodies. such as rollsandthe like. One of the objects thereof is to provide a practicalapparatus of the above nature characterlzed by eiicient and accurateaction. Another object is to provide apparatus of the above nature ofsimple and yet secure construction in which the parts are readilyaccessible. Another object is to provide ap ara-tus of the above naturecharacterized y 1mproved feed of 'the articles to be ground. Anotherobject is to the 4above nature which shall bereadily adaptable toaccommodate various sizes and shapes of material, and to meet varyingconditions of practical use. Other objects lwill be in part obvious andin part pointed out 2o hereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the structure hereinafter 254 described and the scope ofthe application of which will be indicated in the following claims. l

In the accompanying drawings in which is shown one of various possibleembodiments of this invention,

Figure 1 is a plan View of the same; Figure 2 is a front elevation; andFigure 3 is an end elevation. Similar reference characters refer tosimi- `lar parts throughout the several views ofthe drawings.

Referring now to Figure 1 of the drawings, there is shown a frame 10having mounted thereon a carriage 11 which is ad- 40 .justabletransversely of the frame as by means of the bolts 12 and slots 13 bywhich the carriage is held inposition. Journaled` on this carriage insuitable bearings 14 is a shaft provided with a pulley 15. At the nnerend of this shaft is mounted by means of a suitableholder 16 a ringrindingwheel 17 of emery or like material. .v

At the opposite end of the frame 10 is a carriage 18 adjustablelongitudinally of the machine b the usual threaded connection controlledy the feed wheel 19. Upon thisy carriage and journaled in the bearings2() is a shaft having the pulley 21 fixed thereto. .At the inner endofthis shaft a holder 22 provide apparatus of for another ring wheel 23 ofa. construction 'and composition similar to the wheel 17.

The pulleys 15 and 421 are respectively driven from the pulleys' 24 and25 upon a drive shaft 26 in the base of 'the machine. It is to beunderstood that the pulley '17 is driven at such high speed as to give.the peripheral travel of the wheel 17 a rate of several thousand feetper minute. It is also to be understood that the pulley 21 is driven ata much lower speed, perhaps in the general neighborhood of fifty R.- P.M. 0r less, depending upon. the diameter or size of the wheel 23, and sothat the latter will perform the functions hereinafter noted.

By referencel to Figure 1 of the drawings 1t will be seen that theshafts are so posiu tioned that the portions of the wheels between theaxes of the shafts overlap one another in a radial direction. In otherwords, the wheels are offset transversely as well as longitudinally, andin this embodiment are operative by way of 'their side faces.

The direction of drive of these wheels is such that the grinding wheel17 at its point of action travels downwardly and the slow or regulatingwheel 23 travels in the opposite direction or upwardly where it contacts'the work. The drive between the shaft 26 and the wheelv shafts may beobtained by v suitable belts 27 and 28 as indicated in the drawings;spring-pressed rolls 29 .and 30 being utilized to maintain the desiredbelt pressure and increase the surface of contact between the belts andpulleys.

Intermediate 'the wheels is a work support or carrier 31 on which therolls rest while subjected to the action of the wheels in their travelup to and awayfrom such point of action. This carrier is clamped as by apivot bolt 32 within upright slots 33 in a vertically extendingsupporting device 31. By this mounting it will be seen that an angularadjustment about the pivot bolts 32, as

well as a vertical adjustment, permitted by slot 33, of the carrier orwork support may be secured. The vvertically extending support 34 formsa portion of a small superposed lengthwise extending carriage (see alsoFig..2) which is mounted by. suitable ways on the'carriage 18 so as tobe adjustable with Vrespect thereto .by means of the threaded shaft 36controlled by the small hand wheel 37. Also as the carriagey 18 is movedby the hand vwheels 19, it moves the up er carriage in like manner.

s best shown in Figure 1 of the drawings, there are provided guides atthe entering sidev of the carrier 31 at 38 and 39 (see also Fig. 2).These guides are clamped against the sidesof the carrier by the bolt 32.and project above its surface to form a trough, the guide 39 restingwithin the central; recess formed by the grinding wheel 17 as is clearlyshown in both Figures 1 and 2; These lguides onto which the work is fedby any suitable means such as an inclined trough, receive the same andguide it right up to the opposed surfaces of the wheels and also guidethe rear end of each roll as it enters into the grip of the wheels. Asthe rolls pass out 4of the grip they are received between a short guide40 and a long guide 41 clamped upon opposite sides of the carrier as bythe screw 42. Theextreme outer end of the guide 41 may be inclinedslightly away from the wheel 23 in order to throw the rollsVL away fromthe downwardly moving portion of the wheel and into any suitable form ofdischarge chute. This guide 41 at its end toward the front of themachine rests within' the central recess of the annular regulating wheel23 as is clearly shown in Fig. 1. f

The upper surface of the carrier as sli-own in Figure 3 of the drawingsis in this embodiment substantially horizontal, and 'located above theplane of the axes of the two wheels.

In the action of the apparatus, the rolls are fed as above described on'to the carrier at the front side of the machine, that is, between theguides 38 and/139; From this oint they travel in thefdirection indicatedy the arrow in Figure'lof the drawings into the grip of the wheels. Whenthey enter the grip, the regulating wheel on account of its slow speedcontrols their movement, its grip upon the work being much greater thanthat of the rapidly moving grinding wheel which continually cuts itselfclear. The upwardly moving operative surface of the regulating wheelaccordingly rotates the roll in the direction indicated thereon inFigure 2 of the drawings and it is held firmly against the carrier andground by the rapid downwardly moving face of the grinding wheel.Furthermore the contacting sur ace of the regulating wheel has acomponent, lengthwise of the carrier in the direction toward the rear ofthe machine and accordingly `there is a carefully governed and properlypredetermined rate of feed of the rolls along the carrier. It is to benoted moreover that the active face of the grinding wheel also has acomponent vin the Adirection of feed of the rolls at its point ofcontact therewith, and thus has a tendency to aid instead of oppose thisfeed- .so predetermined that the rolls will be rotated during thegrinding action at the speed best calculated to produce unifornrandaccurate results. Furthermore, the rate of feed is readily varied tosuit the character4 of work to be ground, and other factors, for if theinclination or elevation of the work support is changed, there will be acorresponding variation in the feed rate. variation moreover may begained without disturbing the rate at which the wheels are driven. .l

When it is desired to change the diameter of work acted upon, theregulating wheel may readily be varied in its .distance from thegrinding wheel, and it is to be understood that it is positively held insuch changed position with no tendency to follow up any diminution ofthe diameter of the article during the grinding action. 1When thisadjustment is made, the carrierI may be readily moved to occupy aposition midway between the active faces of the wheels, and if necessarythe distance between the guide plates may be varied by shims orotherwise. By thetransverse adjustment of the grinding wheel, moreover,the amount of overlap of the two wheels may be readily adjusted, and ifdesired larger or smaller wheels be employed by varying the distancebetween their axes. The operation of truing up the twheels may beaccomplished in the usual manner by runninga double diamond along thepath of the work, and any wear or cutting away of the wheels may becompensated for by a suitable adjustment of the carriages 18 and It willthus be seen that all parts ofv the machine are readily accessible andlthat it is readily adaptable to meet all conditions of work and use.

As various possible embodiments might be made of the above invention andas various changes might be made in the embodiment above set forth, itis to be understood that lall matter hereinabove set forth or shown inthel accompanying drawingsis to be interpreted as illustrative and notin a limiting sense.

I claim as my invention 1. vIn a grinding machine, in combination, .agrinding wheel having an annular opera- *tive surface, a regulatingwheel having an This lolo

said two wheels with their axes of rotation substantiallyparallel and ina substantially horizontal plane but spaced laterally out of alincmentand in such relation that said annular operative surfaces thereofoverlap in a radial direction, means including a driven shaft rotatablymounted in said frame and extending in the general direction of the axesof said wheels, said shaft having driving connections for driving saidgrinding wheel at a relatively high speed and for driving saidregulating vwheel at a relatively low speed, whereby said grinding wheelmay perform a grinding operation uponwork ini terposed between saidwheels and said regulating wh-eel may control the rotation of saidinterposed work, said'shaft driving said two wheels in the samedirection about their respective axes, whereby said overlapping portionsof the operative surfaces of said two wheels travel in 'oppositedirections, means for moving one of said wheels'substantially lengthwiseof its axis of rotation to vary the distance between said overlappinportions of the annular surfaces of the w eels, and a work supportextending between said overlapping portions of the annular surfaces ofsaid two wheels and adapted to support work of round section inoperative relation to said two wheels.

2. In a grinding machine, in combination, a frame rotatably supportingtwo substantially parallel shafts extending away from one another andthe one displaced laterally from the other7 a grinding wheel having anannular operative surface mounted on the near end of one of said shafts,a regulating wheel having an annular operative surface mounted on thenear end of the other ofsaid shafts,whereby the annular operative sur-.faces of said two wheels overlap in a radial direction, a work supportfor holding work of round section in operative relation to theoverlapping portions of said two wheels, means for driving the saidshafts in the same direction about their axes so that the overlappingportions thereof travel in opposite directions and at respective speedssuch that the grinding wheel'may perform a grinding operation on thework and the regulating wheel control the rotation yof the work duringits action kthereon by said grinding wheel, means for moving one of saidwheels in a direction substantially lengthwise of its axis to vary thedistance between the overlapping portions of s aid annular surfaces andmeans comprising a carriage movably carried by said frame andsubstantially alongside of one of said shafts and substantially oppositethe.wheel on the other shaft for movably supporting said work support t0vary its position relative Ito one of said wheels.-

3. In a grinding machine, in combination, a frame rotatably supportingtwo substantially parallel shafts extending away vfrom one another andthe one displaced laterally from the other, one .of said sb afts beingycarried by a slide mounted upon said frame for movement in a generaldirection in which 'lating surface mounted on the near end of the othersaid shafts extend, a grinding wheel having an annular operative surfacemounted on the near end of one of Saidshafts, a reguwheel having anannular operative of said shafts, whereby the annular operative surfacesof said two wheels overlap in a radial d'rection, a Work support forholding worlrof round section in operative relation to the overlappingportions of said two wheels, means for driving the said shafts in thesame direction about their axes so that the overlapping portions thereoftravel in opposite directions and at respective speeds such'that thegrinding wheel may perform a grinding operation on the work and theregulating wheel control the rotation of the work during its actionthereon by said grinding wheel, and a carriage movably mounted upon saidslide and extending substantially alongside of the shaft carried by saidslidev for supporting said work support.

4. In a grinding machine, in combination, a grinding wheel having anannular operative surface, a regulating wheel having an annularoperative surface, means mounting said two wheels with their axes ofrotation substantially parallel and in a substantially 'horizontal planebut spaced laterally out of alinement and in such relation that saidannular operative, surfaces thereof overlap in a radial direction, meansfor driving said grinding wheel at a high speed of rotation about itsaxis, means for driving said regulating wheel at a much lower speed ofrotation and in a direction about its axis the same as the direction inwhich. said grinding Wheel is driven about its axis, means'for adjustingthe position of one of said wheels substantially lengthwise of its axisof rotation tovary the'distance between said.overlapping portions ofsaid annular surfaces jo'f the wheels, means lfor adjfting the positionof'oneof .said wheels'substantially transversely of "its axis ofrotation to vary the amount ofsaid overlap, a substantially horizontalwork support extending between said overlapping portions of said annularsurfaces adapted .to support' work of general cylindrical shape' to beacted upon by bothv said grinding -wheel and said regulating wheel, saidwork support projecting at each end beyond said annular surfaces of thewheels, and guides secured to the sides of each of said projecting endsof said pro-- jecting ends of said work support adapted to hold the workthereon away from contact'with the central portions of the faces of saidwheels interior of said annular operating faces thereof, said innerportions of loo lll)

the wheel faces beingrecessed to accommodate said guides.

5. In a grinding machine, in combination,

a grinding wheel having an annular operative surface, a regulatmg'wheelhaving an annular operative surface, means mounting said two Wheels withtheir axes of rotation substantially parallel and in a substantiallyhorizontal plane but spaced laterally out of alinement and in suchrelation that said annular operative surfaces thereof overlap in aradial direction, means for driving said grinding wheel at a high speedof rotation about its axis, means for driving said regulating wheel at amuch lower speed of rotation and in a direction about its axis the sameas the direction in which said grinding Wheel is driven about its axis,means for' adjusting the position of one of said wheels substantiallylengthwise of its axis of lrotation to vary the distance between saidoverlapping portions of said annular surfaces of the wheels, means foradjusting the position of one of said wheels substantially transverselyof its axis of rotation to vary the amount of said overlap, asubstantially horizontal Work support extending between said overlappingportions'of said annular surfaces adapted to support work of generalcylindrical Shape to be acted upon by both said grinding wheel and saidregulating wheel, means for adjusting the position of said work supportin a direction substantially parallel to 'the axes of rotation of saidWheels to center said Work support inthe space between said overlappingportions of the wheels, and means for adjustably tilting said Worksupport for adjustably inclining the path of travel of the work thereonwith respect to the operating surfaces of the Wheels. l

In testimony whereof, I have signed my name to this specification this26th day of 1 LEWIS R, HEIM.

p September, 1921.

